19838080

素因数分解:

$2^7\times 5^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:381

約数の個数: 64

約数和(自身を含む): 47980800

約数和(自身を除く): 28142720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 139, 160, 223, 278, 320, 446, 556, 640, 695, 892, 1112, 1115, 1390, 1784, 2224, 2230, 2780, 3568, 4448, 4460, 5560, 7136, 8896, 8920, 11120, 14272, 17792, 17840, 22240, 28544, 30997, 35680, 44480, 61994, 71360, 88960, 123988, 142720, 154985, 247976, 309970, 495952, 619940, 991904, 1239880, 1983808, 2479760, 3967616, 4959520, 9919040, 19838080]

約数ペア:

[(1, 19838080), (2, 9919040), (4, 4959520), (5, 3967616), (8, 2479760), (10, 1983808), (16, 1239880), (20, 991904), (32, 619940), (40, 495952), (64, 309970), (80, 247976), (128, 154985), (139, 142720), (160, 123988), (223, 88960), (278, 71360), (320, 61994), (446, 44480), (556, 35680), (640, 30997), (695, 28544), (892, 22240), (1112, 17840), (1115, 17792), (1390, 14272), (1784, 11120), (2224, 8920), (2230, 8896), (2780, 7136), (3568, 5560), (4448, 4460)]